A dual-output control and detection circuit, system, and method

Abstract

This invention discloses a dual-output control and detection circuit, including a control circuit, a first detection sampling circuit, a second detection sampling circuit, and a remote matching load circuit. The control circuit includes a drive control module, a first switch module, and a second switch module. The drive control module controls the operation of the first and second switch modules. The first switch module switches between a first control state and a second control state; the second switch module switches between a third control state and a fourth control state. The drive control module receives signals from the first and second detection sampling circuits and controls the operation of the first and second switch modules. This application uses a three-wire output, which can detect open circuit and short circuit faults when the device is not started, ensuring normal operation of the device. It has advantages such as low cost, simple implementation, high reliability, and reduced engineering costs.

Description

Technical Field

[0001] This invention relates to the field of fire protection, and in particular to a dual-output control and detection circuit, system, and method. Background Technology

[0002] The national standard GB16806, "Fire Protection Linkage Control System", requires that for important fire protection equipment, when the equipment is not in operation, it should be able to detect open circuit and short circuit faults in the wiring between the control center and the fire protection equipment.

[0003] In the event of a fire, a large number of fire-fighting equipment needs to be activated. Conventional equipment operation relies on continuous power supply, which results in a high power output requirement when multiple devices are activated. However, by employing a pulse-triggered drive control method (i.e., dual-output control; pulse triggering controls a set of remote device start relays during startup, and pulse triggering controls a remote stop relay during shutdown), power consumption is only momentarily during startup and shutdown, significantly reducing fire-fighting power consumption. Conventional trigger-driven methods on the market require four wires, wasting wiring; while two-wire output methods exist, they cannot achieve the dual-output function of controlling two sets of relays. Summary of the Invention

[0004] To solve the above-mentioned technical problems, this application provides a dual-output control and detection circuit, including a control circuit, a first detection and sampling circuit, a second detection and sampling circuit, and a remote matching load circuit;

[0005] The remote matching load circuit includes a first input terminal, a second input terminal, a third input terminal, and a fourth input terminal; a first load resistor and a series circuit formed by a first diode and a second diode connected in series are connected in parallel between the first input terminal and the second input terminal, and the positive terminals of the first diode and the second diode are electrically connected to the two ends of the first load resistor, respectively; the third input terminal and the fourth input terminal are electrically connected to the negative terminals of the first diode and the second diode, respectively, through the second load resistor and the third load resistor;

[0006] The control circuit includes a drive control module, a first switch module, and a second switch module. The drive control module is used to control the operation of the first switch module and the second switch module. The first switch module is used to switch between a first control state and a second control state. The second switch module is used to switch between a third control state and a fourth control state.

[0007] In the first state, the first input terminal is connected to the VDD terminal, and the first detection and sampling circuit is disconnected from the VDD terminal; in the second state, the first input terminal is grounded, and the first detection and sampling circuit is connected to the VDD terminal; in the third state, the second input terminal is connected to the first detection and sampling circuit, and the third input terminal is connected to the second sampling circuit; in the fourth state, the second input terminal is disconnected from the first detection and sampling circuit, and the third input terminal is connected to the VDD terminal.

[0008] The drive control module receives signals from the first detection sampling circuit and the second detection sampling circuit, and controls the first switch module and the second switch module to operate.

[0009] Preferably, it further includes a load device circuit, the load device circuit including a third switch module, a third diode and a device action feedback switch, the first end of the third switch module is connected to the first input terminal, the second end of the third switch module is connected to the cathode of the third diode, the anode of the third diode is connected to the second input terminal, and the device action feedback switch is connected between the third input terminal and the fourth input terminal;

[0010] The load device circuit further includes a fourth switch module and a fourth diode. The first end of the fourth switch module is connected to the first input terminal, the second end of the fourth switch module is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the third input terminal.

[0011] Preferably, the first switch module includes a first relay, the first relay having a first coil, a first moving contact, a first stationary contact, a second stationary contact, a second moving contact, a third stationary contact, and a fourth stationary contact; the second switch module includes a second relay, the second relay having a second coil, a third moving contact, a fifth stationary contact, a sixth stationary contact, a fourth moving contact, a seventh stationary contact, and an eighth stationary contact; the first coil and the second coil are connected to the drive control module, the first moving contact is connected to the first input terminal, the first stationary contact is connected to VDD, and the second stationary contact is grounded; the second moving contact is connected to the fifth stationary contact, the third stationary contact is floating, and the fourth stationary contact is connected to VDD; the third moving contact is connected to the second input terminal, and the fifth stationary contact is connected via a fourth resistor. Grounded, the sixth stationary contact is left floating; the fourth moving contact is connected to the third input terminal, the seventh stationary contact is grounded via the fifth resistor, and the eighth stationary contact is connected to VDD; in the first state, the first moving contact is connected to the first stationary contact, and the second moving contact is connected to the third stationary contact; in the second state, the first moving contact is connected to the second stationary contact, and the second moving contact is connected to the fourth stationary contact; in the third state, the third moving contact is connected to the fifth stationary contact, and the fourth moving contact is connected to the seventh stationary contact; in the fourth state, the third moving contact is connected to the sixth stationary contact, and the fourth moving contact is connected to the eighth stationary contact; the first detection sampling circuit is connected to the fifth stationary contact, and the second detection sampling circuit is connected to the seventh stationary contact.

[0012] Preferably, the drive control module includes a first control circuit, which includes a fifth input terminal, a first capacitor, a sixth resistor, a seventh resistor, a fifth diode, and a first transistor. The first capacitor is connected between the fifth input terminal and ground, the seventh resistor is connected between the fifth input terminal and ground, the first end of the sixth resistor is connected to the fifth input terminal, the second end of the sixth resistor is connected to the anode of the fifth diode, the cathode of the fifth diode is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the first coil, and the emitter of the first transistor is grounded.

[0013] Preferably, the drive control module includes a second control circuit, which includes a sixth input terminal, a second capacitor, an eighth resistor, a ninth resistor, a sixth diode, and a second transistor. The second capacitor is connected between the sixth input terminal and ground, the ninth resistor is connected between the sixth input terminal and ground, the first end of the eighth resistor is connected to the sixth input terminal, the second end of the eighth resistor is connected to the anode of the sixth diode, the cathode of the sixth diode is connected to the base of the second transistor, the collector of the second transistor is connected to one end of the second coil, and the emitter of the second transistor is grounded.

[0014] Preferably, the first detection sampling circuit includes a first sampling input terminal, a first inductor, a tenth resistor, a third capacitor, a third transistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a first sampling output terminal; the first sampling input terminal is connected to the fifth stationary contact, the first inductor and the tenth resistor are connected in series between the first sampling input terminal and the base of the third transistor, the collector of the third transistor is connected to VCC, the emitter of the third transistor is grounded through the twelfth resistor, the third capacitor is connected between the base of the third transistor and ground, the eleventh resistor is connected between the base of the third transistor and ground, and the thirteenth resistor is connected between the emitter of the third transistor and the first sampling output terminal.

[0015] Preferably, the second detection sampling circuit includes a second sampling input terminal, a second inductor, a fourteenth resistor, a fourth capacitor, a fourth transistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, and a second sampling output terminal; the second sampling input terminal is connected to the seventh stationary contact, the second inductor and the fourteenth resistor are connected in series between the second sampling input terminal and the base of the fourth transistor, the collector of the fourth transistor is connected to VCC, the emitter of the fourth transistor is grounded through the sixteenth resistor, the fourth capacitor is connected between the base of the fourth transistor and ground, the fifteenth resistor is connected between the base of the fourth transistor and ground, and the seventeenth resistor is connected between the emitter of the fourth transistor and the second sampling output terminal.

[0016] This application also provides a dual-output control and detection system, which includes the dual-output control and detection circuit described above.

[0017] This application also provides a dual-output control detection method, which uses the dual-output control detection circuit described above. The method is characterized in that the lines containing the first input terminal, the second input terminal, and the third input terminal are respectively the first line, the second line, and the third line. The method includes the following steps:

[0018] The first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state. The first switch module and the second switch module do not operate.

[0019] If the sampling voltage of the first detection sampling circuit is within the first voltage range and the sampling voltage of the second detection sampling circuit is within the second voltage range, then the first line, the second line, and the third line are all normal.

[0020] If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both 0, then the first line is open.

[0021] If the sampling voltage of the first detection sampling circuit is 0 and the sampling voltage of the second detection sampling circuit is not 0, then the second line is open.

[0022] If the sampling voltage of the first detection sampling circuit is not 0 and the sampling voltage of the second detection sampling circuit is 0, then the third line is open.

[0023] If only the sampling voltage of the first detection sampling circuit is within the third voltage range, then there is a short circuit between the first line and the second line.

[0024] If only the sampling voltage of the second detection sampling circuit is within the fourth voltage range, then there is a short circuit between the first line and the third line.

[0025] If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both within the fifth voltage range, then the second line and the third line are short-circuited.

[0026] Preferably, it includes:

[0027] The first switch module is controlled to switch to the second state, and the second switch module is controlled to switch to the third state. The first relay is activated, the second relay is not activated, and the third switch module is activated, thereby driving the device to start. The device then activates the feedback switch and closes.

[0028] The first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state. The first relay and the third switch module resume operation. The sampling voltage of the first detection sampling circuit is a sixth voltage range value, and the sampling voltage of the second detection sampling circuit is a seventh voltage range value. The control circuit obtains feedback on device startup based on the sixth voltage range value and the seventh voltage range value.

[0029] The method also includes:

[0030] The first switch module is controlled to switch to the second state, and the second switch module is controlled to switch to the fourth state. The first relay and the second relay are activated, which drives the fourth switch module to activate, thereby driving the remote device to stop. The device activation feedback switch is then disconnected.

[0031] The first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state. The first relay, the second relay, and the fourth switch module resume operation. The sampling voltage of the first detection sampling circuit is the eighth voltage range value, and the sampling voltage of the second detection sampling circuit is the ninth voltage range value. The control circuit obtains feedback that the device has stopped based on the eighth voltage range value and the ninth voltage range value.

[0032] The dual-output control and detection circuit, system, and method of this invention have the following advantages: This application adopts a three-wire output, which can detect open circuit and short circuit faults when the equipment is not started, ensuring that the equipment can operate normally. It has advantages such as low cost, simple implementation, high reliability, and reduced engineering costs. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort:

[0034] Figure 1 This is a schematic diagram of a dual-output control and detection circuit structure according to a preferred embodiment of the present invention;

[0035] Figure 2 This is a schematic diagram of the structure of the remote matching load circuit of a dual-output control and detection circuit according to a preferred embodiment of the present invention;

[0036] Figure 3 This is a circuit diagram of a load device circuit of a dual-output control and detection circuit according to a preferred embodiment of the present invention.

[0037] Figure 4 This is a circuit diagram of a drive control module of a dual-output control and detection circuit according to a preferred embodiment of the present invention.

[0038] Figure 5 This is a circuit diagram of the first detection sampling circuit of a dual-output control detection circuit according to a preferred embodiment of the present invention;

[0039] Figure 6 This is a circuit diagram of the second detection sampling circuit of a dual-output control detection circuit according to a preferred embodiment of the present invention. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0041] See also Figure 1 , Figure 1 This application provides a schematic diagram of a dual-output control and detection circuit, which includes a control circuit 1, a first detection and sampling circuit 3, a second detection and sampling circuit 4, and a remote matching load circuit 2.

[0042] In one embodiment, such as Figure 2 The diagram shows a schematic of the remote matching load circuit of a dual-output control and detection circuit provided in this application. The remote matching load circuit includes a first input terminal OUT1, a second input terminal OUT2, a third input terminal OUT3, and a fourth input terminal OUT4. A first load resistor R15 and a series circuit formed by a first diode D5 and a second diode D6 connected in series are connected in parallel between the first input terminal OUT1 and the second input terminal OUT2. The positive terminals of the first diode D5 and the second diode D6 are electrically connected to the two ends of the first load resistor R15, respectively. The third input terminal OUT3 and the fourth input terminal OUT4 are electrically connected to the negative terminals of the first diode D5 and the second diode D6 through the second load resistor R16 and the third load resistor R17, respectively.

[0043] See also Figure 1 The control circuit 1 includes a drive control module 11, a first switch module 12, and a second switch module 13. The drive control module 11 is used to control the operation of the first switch module 12 and the second switch module 13. The first switch module 12 is used to switch between the first and second states. The second switch module 13 is used to switch between the third and fourth states.

[0044] In the first state, the first input terminal OUT1 is connected to the VDD terminal, and the first detection and sampling circuit 3 is disconnected from the VDD terminal; in the second state, the first input terminal OUT1 is grounded, and the first detection and sampling circuit 3 is connected to the VDD terminal; in the third state, the second input terminal OUT2 is connected to the first detection and sampling circuit 3, and the third input terminal OUT3 is connected to the second sampling circuit 4; in the fourth state, the second input terminal OUT2 is disconnected from the first detection and sampling circuit 3, and the third input terminal OUT3 is connected to the VDD terminal.

[0045] The drive control module 11 receives signals from the first detection sampling circuit 3 and the second detection sampling circuit 4, and controls the first switch module 12 and the second switch module 13 to operate.

[0046] This application provides a dual-output control and detection circuit that uses a three-wire output. When the equipment is not started, it can detect open-circuit and short-circuit faults, ensuring normal operation. It has advantages such as low cost, simple implementation, high reliability, and reduced engineering costs.

[0047] like Figure 3 The diagram shown is a structural schematic of the load device circuit of a dual-output control and detection circuit according to a preferred embodiment of the present invention. The dual-output control and detection circuit also includes a load device circuit, which includes a third switch module K3, a third diode D7, and a device action feedback switch J. The first end of the third switch module K3 is connected to the first input terminal OUT1, the second end of the third switch module K3 is connected to the cathode of the third diode D7, the anode of the third diode D7 is connected to the second input terminal OUT2, and the device action feedback switch J is connected between the third input terminal OUT3 and the fourth input terminal OUT4.

[0048] The load device circuit also includes a fourth switch module K4 and a fourth diode D8. The first end of the fourth switch module K4 is connected to the first input terminal OUT1, the second end of the fourth switch module K4 is connected to the cathode of the fourth diode D8, and the anode of the fourth diode D8 is connected to the third input terminal OUT.

[0049] like Figure 4The diagram shown is a circuit diagram of the drive control module of a dual-output control and detection circuit according to a preferred embodiment of the present invention. The first switch module 12 includes a first relay K1, which has a first coil, a first moving contact, a first stationary contact, a second stationary contact, a second moving contact, a third stationary contact, and a fourth stationary contact. The second switch module 13 includes a second relay K2, which has a second coil, a third moving contact, a fifth stationary contact, a sixth stationary contact, a fourth moving contact, a seventh stationary contact, and an eighth stationary contact. The first coil and the second coil are connected to the drive control module 11. The first moving contact is connected to the first input terminal OUT1, the first stationary contact is connected to VDD, and the second stationary contact is grounded. The second moving contact is connected to the fifth stationary contact, the third stationary contact is left floating, and the fourth stationary contact is connected to VDD. The third moving contact is connected to the second input terminal OUT2, the fifth stationary contact is grounded via a fourth resistor R12, and the sixth stationary contact is left floating. The fourth moving contact is connected to the third input terminal OUT3, the seventh stationary contact is grounded via a fifth resistor R11, and the eighth stationary contact is connected to VDD. In the first state, the first moving contact is connected to the first stationary contact, and the second moving contact is connected to the third stationary contact; in the second state, the first moving contact is connected to the second stationary contact, and the second moving contact is connected to the fourth stationary contact; in the third state, the third moving contact is connected to the fifth stationary contact, and the fourth moving contact is connected to the seventh stationary contact; in the fourth state, the third moving contact is connected to the sixth stationary contact, and the fourth moving contact is connected to the eighth stationary contact; the first detection sampling circuit 3 is connected to the fifth stationary contact, and the second detection sampling circuit 4 is connected to the seventh stationary contact.

[0050] In one embodiment, the drive control module 11 includes a first control circuit 111, which includes a fifth input terminal CONTROL1, a first capacitor C3, a sixth resistor R9, a seventh resistor R10, a fifth diode D2, and a first transistor Q3. The first capacitor C3 is connected between the fifth input terminal CONTROL1 and ground, the seventh resistor R10 is connected between the fifth input terminal CONTROL1 and ground, the first end of the sixth resistor R9 is connected to the fifth input terminal CONTROL1, the second end of the sixth resistor R9 is connected to the anode of the fifth diode D2, the cathode of the fifth diode D2 is connected to the base of the first transistor Q3, the collector of the first transistor Q3 is connected to one end of the first coil, and the emitter of the first transistor Q3 is grounded.

[0051] In one embodiment, the drive control module 11 includes a second control circuit 112, which includes a sixth input terminal CONTROL2, a second capacitor C4, an eighth resistor R13, a ninth resistor R14, a sixth diode D4, and a second transistor Q4. The second capacitor C4 is connected between the sixth input terminal CONTROL2 and ground, the ninth resistor R14 is connected between the sixth input terminal CONTROL2 and ground, the first end of the eighth resistor R13 is connected to the sixth input terminal CONTROL2, the second end of the eighth resistor R13 is connected to the anode of the sixth diode D4, the cathode of the sixth diode D4 is connected to the base of the second transistor Q4, the collector of the second transistor Q4 is connected to one end of the second coil, and the emitter of the second transistor Q4 is grounded.

[0052] In one embodiment, the first detection sampling circuit 3 includes a first sampling input terminal ENTA, a first inductor L1, a tenth resistor R1, a third capacitor C1, a third transistor Q1, an eleventh resistor R2, a twelfth resistor R4, a thirteenth resistor R3, and a first sampling output terminal CHECK_A. The first sampling input terminal ENTA is connected to a fifth stationary contact. The first inductor L1 and the tenth resistor R1 are connected in series between the first sampling input terminal ENTA and the base of the third transistor Q1. The collector of the third transistor Q1 is connected to VCC, and the emitter of the third transistor Q1 is grounded through the twelfth resistor R4. The third capacitor C1 is connected between the base of the third transistor Q1 and ground. The eleventh resistor R2 is connected between the base of the third transistor Q1 and ground. The thirteenth resistor R3 is connected between the emitter of the third transistor Q1 and the first sampling output terminal CHECK_A.

[0053] In one embodiment, the second detection sampling circuit 4 includes a second sampling input terminal ENTB, a second inductor L2, a fourteenth resistor R5, a fourth capacitor C2, a fourth transistor Q2, a fifteenth resistor R6, a sixteenth resistor R8, a seventeenth resistor R7, and a second sampling output terminal CHECK_B. The second sampling input terminal ENTB is connected to the seventh stationary contact. The second inductor L2 and the fourteenth resistor R5 are connected in series between the second sampling input terminal ENTB and the base of the fourth transistor Q2. The collector of the fourth transistor Q2 is connected to VCC, and the emitter of the fourth transistor Q2 is grounded through the sixteenth resistor R8. The fourth capacitor C2 is connected between the base of the fourth transistor Q2 and ground. The fifteenth resistor R6 is connected between the base of the fourth transistor Q2 and ground. The seventeenth resistor R7 is connected between the emitter of the fourth transistor Q2 and the second sampling output terminal CHECK_B.

[0054] The first inductor L1 and the second inductor L2 mentioned above serve to suppress circuit pulse interference.

[0055] This application also provides a dual-output control and feedback detection system, which includes the dual-output control and detection circuit described above.

[0056] This application also provides a dual-output control detection method, which uses the dual-output control detection circuit described above, wherein the lines containing the first input terminal, the second input terminal, and the third input terminal are the first line, the second line, and the third line, respectively. The method includes the following steps:

[0057] The first switch module 12 is controlled to switch to the first state, and the second switch module 13 is controlled to switch to the third state; the first switch module 12 and the second switch module 13 do not operate.

[0058] If the sampling voltage of the first detection sampling circuit 3 is within the first voltage range and the sampling voltage of the second detection sampling circuit 4 is within the second voltage range, then the first line, the second line, and the third line are all normal.

[0059] If the sampling voltage of the first detection sampling circuit 3 and the sampling voltage of the second detection sampling circuit 4 are both 0, then the first line is open.

[0060] If the sampling voltage of the first detection sampling circuit 3 is 0 and the sampling voltage of the second detection sampling circuit is not 0, then the second line is open.

[0061] If the sampling voltage of the first detection sampling circuit 3 is not 0 and the sampling voltage of the second detection sampling circuit is 0, then the third line is open.

[0062] If only the sampling voltage of the first detection sampling circuit 3 is within the third voltage range, then there is a short circuit between the first line and the second line.

[0063] If only the sampling voltage of the second detection sampling circuit 4 is within the fourth voltage range, then there is a short circuit between the first line and the third line.

[0064] If the sampling voltage of the first detection sampling circuit 3 and the sampling voltage of the second detection sampling circuit 4 are both within the fifth voltage range, then there is a short circuit between the second line and the third line.

[0065] In one embodiment, the dual-output control detection method further includes:

[0066] The first switch module 12 is switched to the second state, and the second switch module 13 is switched to the third state. The first relay K1 is activated, the second relay K2 is not activated, and the third switch module is activated, thereby driving the device to start. Then the device action feedback switch is closed.

[0067] The first switch module 12 is switched to the first state, and the second switch module 13 is switched to the third state. The first relay K1 and the third switch module resume operation. The sampling voltage of the first detection sampling circuit 3 is the sixth voltage range value, and the sampling voltage of the second detection sampling circuit 4 is the seventh voltage range value. The control circuit obtains feedback on device startup based on the sixth voltage range value and the seventh voltage range value.

[0068] The method also includes:

[0069] The first switch module 12 is switched to the second state, and the second switch module 13 is switched to the fourth state. The first relay K1 and the second relay K2 are activated, driving the fourth switch module to activate, thereby driving the remote device to stop, and the device action feedback switch is disconnected.

[0070] The first switch module is switched to the first state, and the second switch module is switched to the third state. The first relay K1, the second relay K2, and the fourth switch module K4 resume operation. The sampling voltage of the first detection sampling circuit 3 is the eighth voltage range value, and the sampling voltage of the second detection sampling circuit is the ninth voltage range value. The control circuit obtains feedback that the device has stopped based on the eighth voltage range value and the ninth voltage range value.

[0071] This application provides a dual-output control and feedback detection method using a three-wire output. It can drive two sets of remote relays (i.e., the third switch module K3 and the fourth switch module K4, corresponding to equipment start and equipment stop), and can also feed back equipment start and stop signals to the control circuit. When the equipment is not started, it can detect open circuit and short circuit faults to ensure normal equipment operation. It has advantages such as low cost, simple implementation, high reliability, and reduced engineering costs.

[0072] The following example uses VCC as 5V and VDD as 24V.

[0073] The first switch module 12 is switched to the first state, and the second switch module 13 is switched to the third state. That is, when both the fifth input terminal CONTROL1 and the sixth input terminal of the control circuit are low, the first relay K1 and the second relay K2 do not operate. The first output terminal OUT1 outputs VDD, which flows to the first load resistor R15, back to the second output terminal OUT2, and then to the fourth resistor R12, grounding the circuit. The first sampling circuit samples and detects from the first sampling input terminal ENTA, and the first sampling output terminal CHECKA outputs the sampling voltage. At this time, the voltage at the first sampling input terminal NETA is VDD*(R12 / (R15+R12)); the corresponding sampling voltage range at the first sampling output terminal CHECKA is 0.6~4.1V. Additionally, the first voltage output terminal OUT1 outputs VDD to the first load diode D5, to the second load resistor R16, back to the third output terminal OUT3, and then to the fifth resistor R11, grounding the circuit. The second detection sampling circuit samples and detects from the second sampling input terminal NETB, and the second sampling output terminal CHECKB outputs the sampling voltage. At this time, the voltage of the second sampling input terminal NETB is (VDD-VD5)*(R11 / (R11+R16), where VD5 is the voltage drop of diode D5; the corresponding sampling voltage range of the second sampling output terminal CHECKB is 0.6~1.5V.

[0074] Therefore, if the sampling voltage of the first detection sampling circuit is within the first voltage range and the sampling voltage of the second detection sampling circuit is within the second voltage range, then the first line, the second line, and the third line are all normal.

[0075] If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both 0, then NETA and NETB are both 0, and the first line is open.

[0076] If the sampling voltage of the first detection sampling circuit is 0 and the sampling voltage of the second detection sampling circuit is not 0, then NETA is 0 and NETB is a normal value, and the second line is open.

[0077] If the sampling voltage of the first detection sampling circuit is not 0 and the sampling voltage of the second detection sampling circuit is 0, corresponding to NETA being normal and NETB being 0, then the third line is open.

[0078] If only the sampling voltage of the first detection sampling circuit is within the third voltage range, corresponding to NETA being VDD and NETB being a normal value, then there is a short circuit between the first line and the second line.

[0079] If only the sampling voltage of the second detection sampling circuit is within the fourth voltage range, corresponding to NETA being normal and NETB being VDD, then there is a short circuit between the first and third lines.

[0080] If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both within the fifth voltage range, corresponding to NETA and NETB being equal, then there is a short circuit between the second line and the third line.

[0081] In one embodiment, the third switch module is a third relay. The control method for the remote third relay K3 (pulse control mode, action time 1-2 seconds) is as follows: The first switch module K1 is switched to the second state, and the second switch module K2 is switched to the third state, i.e., the fifth input terminal CONTROL1 is input with a high level and the sixth input terminal CONTROL2 is input with a low level. The first relay K1 is activated, the first output terminal OUT1 outputs ground, and the second output terminal OUT2 outputs VDD, driving the remote third relay K3 to activate. K3's activation drives the remote field start device. After the pulse control ends, the first switch module is switched back to the first state, and the second switch module is switched back to the third state. The first relay K1 and the third relay K3 are restored. The remote device action feedback signal causes the device action feedback switch J to close (i.e.,...). Figure 3 (The load is closed on pins 3 and 4). At this time, the first output terminal OUT1 outputs VDD, which goes to the first diode D5, then to the second load resistor R16 and the third load resistor R17 (because the device action feedback switch J is closed, the second load resistor R16 and the third load resistor R17 are actually connected in parallel, reducing the value of the second load resistor R16. The value of the second sampling input terminal NETB is closely related to whether R17 is connected in parallel to R16. Choosing an appropriate value for the third load resistor R17 can correctly determine whether the controlled device has acted). It returns to the third output terminal OUT3, which goes to the fifth resistor R11. The second detection sampling circuit samples from the second sampling input terminal NETB. The seventh voltage range of the second sampling output terminal CHECKB is 1.6 to 4.1V. The first detection sampling circuit samples from the first sampling input terminal NETA. The sixth voltage range of the first sampling output terminal CHECKA is 2.0 to 3.8V. The feedback response of device start-up is obtained through the values ​​of the sixth voltage range value CHECKA and the seventh voltage range value CHECKB.

[0082] In one embodiment, the fourth switch module is a fourth relay. The remote fourth relay K4 is controlled by a pulse control method (action time 1-2 seconds): the first switch module K1 is switched to the second state, and the second switch module K2 is switched to the fourth state, i.e., the fifth input terminal CONTROL1 and the sixth input terminal CONTROL2 are input with high level. The first relay K1 and the second relay K2 are activated, the second output terminal OUT2 is left floating, the first output terminal OUT1 outputs ground, and the third output terminal OUT3 outputs VDD, driving the remote fourth relay K4 to activate and driving the remote device to stop. After the device stops, the device action feedback switch J is opened. After the pulse control ends, the first switch module is switched to the first state, and the second switch module is switched to the third state. The first relay K1, the second relay K2, and the fourth relay K4 are restored. The voltages of the circuit state detection points NETA and NETB return to normal. The sampling voltage of the first detection sampling circuit is the eighth voltage range value (i.e., the first voltage range value), and the sampling voltage of the second detection sampling circuit is the ninth voltage range value (i.e., the second voltage range value). The control circuit obtains feedback that the device has stopped based on the eighth voltage range value and the ninth voltage range value.

[0083] It should be noted that, in this specification, the terms "comprising," "including," or any other variations thereof are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0084] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A dual-output control and detection circuit, characterized in that, It includes a control circuit, a first detection and sampling circuit, a second detection and sampling circuit, and a remote matching load circuit; The remote matching load circuit includes a first input terminal, a second input terminal, a third input terminal, and a fourth input terminal; a first load resistor and a series circuit formed by a first diode and a second diode connected in series are connected in parallel between the first input terminal and the second input terminal, and the positive terminals of the first diode and the second diode are electrically connected to the two ends of the first load resistor, respectively; the third input terminal and the fourth input terminal are electrically connected to the negative terminals of the first diode and the second diode, respectively, through the second load resistor and the third load resistor; The control circuit includes a drive control module, a first switch module, and a second switch module. The drive control module is used to control the operation of the first switch module and the second switch module. The first switch module is used to switch between a first control state and a second control state. The second switch module is used to switch between a third control state and a fourth control state. In the first state, the first input terminal is connected to the VDD terminal, and the first detection sampling circuit is disconnected from the VDD terminal; in the second state, the first input terminal is grounded, and the first detection sampling circuit is connected to the VDD terminal; in the third state, the second input terminal is connected to the first detection sampling circuit, and the third input terminal is connected to the second detection sampling circuit; in the fourth state, the second input terminal is disconnected from the first detection sampling circuit, and the third input terminal is connected to the VDD terminal. The drive control module receives signals from the first detection sampling circuit and the second detection sampling circuit, and controls the first switch module and the second switch module to operate. The first switch module includes a first relay, which has a first coil, a first moving contact, a first stationary contact, a second stationary contact, a second moving contact, a third stationary contact, and a fourth stationary contact; the second switch module includes a second relay, which has a second coil, a third moving contact, a fifth stationary contact, a sixth stationary contact, a fourth moving contact, a seventh stationary contact, and an eighth stationary contact; the first coil and the second coil are connected to the drive control module; the first moving contact is connected to the first input terminal; the first stationary contact is connected to VDD; the second stationary contact is grounded; the second moving contact is connected to the fifth stationary contact; the third stationary contact is left floating; the fourth stationary contact is connected to VDD; the third moving contact is connected to the second input terminal; the fifth stationary contact is grounded via a fourth resistor; and the sixth stationary contact is left floating. The fourth moving contact is connected to the third input terminal, the seventh stationary contact is grounded via the fifth resistor, and the eighth stationary contact is connected to VDD; in the first state, the first moving contact is connected to the first stationary contact, and the second moving contact is connected to the third stationary contact; in the second state, the first moving contact is connected to the second stationary contact, and the second moving contact is connected to the fourth stationary contact. In the third state, the third moving contact is connected to the fifth stationary contact, and the fourth moving contact is connected to the seventh stationary contact; in the fourth state, the third moving contact is connected to the sixth stationary contact, and the fourth moving contact is connected to the eighth stationary contact; the first detection sampling circuit is connected to the fifth stationary contact, and the second detection sampling circuit is connected to the seventh stationary contact.

2. The dual-output control and detection circuit according to claim 1, characterized in that, It also includes a load device circuit, which includes a third switch module, a third diode, and a device action feedback switch. The first end of the third switch module is connected to the first input terminal, the second end of the third switch module is connected to the cathode of the third diode, the anode of the third diode is connected to the second input terminal, and the device action feedback switch is connected between the third input terminal and the fourth input terminal. The load device circuit further includes a fourth switch module and a fourth diode. The first end of the fourth switch module is connected to the first input terminal, the second end of the fourth switch module is connected to the cathode of the fourth diode, and the anode of the fourth diode is connected to the third input terminal.

3. The dual-output control and detection circuit according to claim 2, characterized in that, The drive control module includes a first control circuit, which includes a fifth input terminal, a first capacitor, a sixth resistor, a seventh resistor, a fifth diode, and a first transistor. The first capacitor is connected between the fifth input terminal and ground, the seventh resistor is connected between the fifth input terminal and ground, the first end of the sixth resistor is connected to the fifth input terminal, the second end of the sixth resistor is connected to the anode of the fifth diode, the cathode of the fifth diode is connected to the base of the first transistor, the collector of the first transistor is connected to one end of the first coil, and the emitter of the first transistor is grounded.

4. The dual-output control and detection circuit according to claim 2, characterized in that, The drive control module includes a second control circuit, which includes a sixth input terminal, a second capacitor, an eighth resistor, a ninth resistor, a sixth diode, and a second transistor. The second capacitor is connected between the sixth input terminal and ground, the ninth resistor is connected between the sixth input terminal and ground, the first end of the eighth resistor is connected to the sixth input terminal, the second end of the eighth resistor is connected to the anode of the sixth diode, the cathode of the sixth diode is connected to the base of the second transistor, the collector of the second transistor is connected to one end of the second coil, and the emitter of the second transistor is grounded.

5. The dual-output control and detection circuit according to claim 2, characterized in that, The first detection sampling circuit includes a first sampling input terminal, a first inductor, a tenth resistor, a third capacitor, a third transistor, an eleventh resistor, a twelfth resistor, a thirteenth resistor, and a first sampling output terminal. The first sampling input terminal is connected to the fifth stationary contact. The first inductor and the tenth resistor are connected in series between the first sampling input terminal and the base of the third transistor. The collector of the third transistor is connected to VCC. The emitter of the third transistor is grounded through the twelfth resistor. The third capacitor is connected between the base of the third transistor and ground. The eleventh resistor is connected between the base of the third transistor and ground. The thirteenth resistor is connected between the emitter of the third transistor and the first sampling output terminal.

6. The dual-output control and detection circuit according to claim 2, characterized in that, The second detection sampling circuit includes a second sampling input terminal, a second inductor, a fourteenth resistor, a fourth capacitor, a fourth transistor, a fifteenth resistor, a sixteenth resistor, a seventeenth resistor, and a second sampling output terminal. The second sampling input terminal is connected to the seventh stationary contact. The second inductor and the fourteenth resistor are connected in series between the second sampling input terminal and the base of the fourth transistor. The collector of the fourth transistor is connected to VCC, and the emitter of the fourth transistor is grounded through the sixteenth resistor. The fourth capacitor is connected between the base of the fourth transistor and ground. The fifteenth resistor is connected between the base of the fourth transistor and ground. The seventeenth resistor is connected between the emitter of the fourth transistor and the second sampling output terminal.

7. A dual-output control and detection system, characterized in that, The system includes a dual-output control and detection circuit as described in any one of claims 1-6.

8. A dual-output control detection method, using the dual-output control detection circuit as described in any one of claims 2-6, characterized in that, The lines where the first input terminal, the second input terminal, and the third input terminal are located are the first line, the second line, and the third line, respectively. The method includes the following steps: The first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state, while the first and second relays do not operate; If the sampling voltage of the first detection sampling circuit is within the first voltage range and the sampling voltage of the second detection sampling circuit is within the second voltage range, then the first line, the second line, and the third line are all normal. If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both 0, then the first line is open. If the sampling voltage of the first detection sampling circuit is 0 and the sampling voltage of the second detection sampling circuit is not 0, then the second line is open. If the sampling voltage of the first detection sampling circuit is not 0 and the sampling voltage of the second detection sampling circuit is 0, then the third line is open. If only the sampling voltage of the first detection sampling circuit is within the third voltage range, then there is a short circuit between the first line and the second line. If only the sampling voltage of the second detection sampling circuit is within the fourth voltage range, then there is a short circuit between the first line and the third line. If the sampling voltage of the first detection sampling circuit and the sampling voltage of the second detection sampling circuit are both within the fifth voltage range, then the second line and the third line are short-circuited.

9. The dual-output control and detection method according to claim 8, characterized in that, include: The first switch module is controlled to switch to the second state, and the second switch module is controlled to switch to the third state. The first relay is activated, the second relay is not activated, and the third switch module is activated, thereby driving the device to start. The device then activates the feedback switch and closes. The first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state. The first relay and the third switch module resume operation. The sampling voltage of the first detection sampling circuit is a sixth voltage range value, and the sampling voltage of the second detection sampling circuit is a seventh voltage range value. The control circuit obtains feedback on device startup based on the sixth voltage range value and the seventh voltage range value. The method also includes: The first switch module is controlled to switch to the second state, and the second switch module is controlled to switch to the fourth state. The first relay and the second relay are activated, which drives the fourth switch module to activate, thereby driving the remote device to stop. The device activation feedback switch is then disconnected. The first switch module is controlled to switch to the first state, and the second switch module is controlled to switch to the third state. The first relay, the second relay, and the fourth switch module resume operation. The sampling voltage of the first detection sampling circuit is the eighth voltage range value, and the sampling voltage of the second detection sampling circuit is the ninth voltage range value. The control circuit obtains feedback that the device has stopped based on the eighth voltage range value and the ninth voltage range value.

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